crankshaft install

[chris laube]

my timing marks do not line up at tdc its at the halfway point when lined up with the timing marks but when i bring it to tdc both valves are closed on the #1 cylinder,what the hell is going on here,pleas help

 

[HCooke]

The timing markls are correct and it should not be at TDC.

 

[Hobo,NC]

(quoted from post at 19:50:36 03/24/13) my timing marks do not line up at tdc its at the halfway point when lined up with the timing marks but when i bring it to tdc both valves are closed on the #1 cylinder,what the hell is going on here,pleas help

Sounds like yours is correct its a ford thang that's uncommon but the way they did it...

An old trick to see if valve timing is right on or (on the rock) would be to remove the head or lifter cover and bring #1 cyl up to compression stroke. While you are rotating the engine coming up on #1 TDC, #4 should be on overlap exhaust valve closing, intake valve opening) on the rock move the crank either way and a valve will move. This should happen right on TDC #1. If a valve on #4 is wide open or doing nothing at all, the valve timing is off... weather it's the cam gear . crank, gear or key way, broken cam, etc. The reason # 4 is the cyl in question is because that is the "middle" cyl in the firing order 1-2-4-3. The "middle cyl should always be in overlap (on the rock). for instance, on a chevy the firing order is 1-8-4-3-6-5-7-2, so if we wanted to see if the valve timing was off we would look at cyl# 6 to see if it was on overlap rolling the engine over to #1 TDC. It should overlap right at #1 TDC at 0 degrees. I hope you did think to index the crank some were so you would know when the crank is on TDC # 1. you can use a piece of bent wire to go threw the plug hole and find TDC.

Its time to confirm this rat now,,, I never trust marks unless it was running good when it came in the shop and I confirmed the marks were dead on during disassembley... Learn this trick and you will be able to time most any engine no marks needed...

Maybe this should replace Tip 53 cuzz drilling around the ports is the most dummarse thing I have ever seen posted here... It Must have been dreamed up at the Ntractornutz club site...

 

[Steve Koons]

Chris, Was putting the engine back together on Bits and Pieces, 1952 8N, and was going to put the distributor in while I had the head off. Sure glad I tried it as when I got the number 1 to TDC, the intake valve was open! Took the front cover off and got to looking closely at the timing marks on the cam gear and the crankshaft! Note the two marks on the crankshaft gear!!! The single mark on the left wasn't the right one!! Guess someone had a real sense of humor!!